Very fun. After getting past the initial starting difficulty, the game is super fun, and a good level of challenge. However, level 5 is just a total maze. There's also a ton of spots on level 5 where you can just fall off and never come back, and spots where you cannot see the platform above/below to switch your side to. Basically, my main issue is that level 5 feels very rushed compared to the rest. I swear I tried going everywhere, but I couldn't figure it out. I feel a maze level isn't a good idea for an autorunning game. Besides that, it controls well and the idea is excellent.